forked from acouzens/open5gs
911 lines
25 KiB
C
911 lines
25 KiB
C
/*
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* Copyright (C) 2019-2024 by Sukchan Lee <acetcom@gmail.com>
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*
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* This file is part of Open5GS.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "ogs-gtp.h"
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#include "mme-event.h"
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#include "mme-gn-build.h"
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#include "mme-gtp-path.h"
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#include "mme-path.h"
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#include "s1ap-path.h"
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#include "mme-s11-build.h"
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#include "mme-sm.h"
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static void _gtpv1v2_c_recv_cb(short when, ogs_socket_t fd, void *data)
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{
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int rv;
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char buf[OGS_ADDRSTRLEN];
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ssize_t size;
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mme_event_t *e = NULL;
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ogs_pkbuf_t *pkbuf = NULL;
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ogs_sockaddr_t from;
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mme_sgw_t *sgw = NULL;
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mme_sgsn_t *sgsn = NULL;
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uint8_t gtp_ver;
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ogs_assert(fd != INVALID_SOCKET);
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pkbuf = ogs_pkbuf_alloc(NULL, OGS_MAX_SDU_LEN);
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ogs_assert(pkbuf);
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ogs_pkbuf_put(pkbuf, OGS_MAX_SDU_LEN);
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size = ogs_recvfrom(fd, pkbuf->data, pkbuf->len, 0, &from);
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if (size <= 0) {
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ogs_log_message(OGS_LOG_ERROR, ogs_socket_errno,
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"ogs_recvfrom() failed");
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ogs_pkbuf_free(pkbuf);
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return;
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}
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ogs_pkbuf_trim(pkbuf, size);
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gtp_ver = ((ogs_gtp2_header_t *)pkbuf->data)->version;
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switch (gtp_ver) {
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case 1:
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sgsn = mme_sgsn_find_by_addr(&from);
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if (!sgsn) {
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ogs_error("Unknown SGSN : %s", OGS_ADDR(&from, buf));
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ogs_pkbuf_free(pkbuf);
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return;
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}
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ogs_assert(sgsn);
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e = mme_event_new(MME_EVENT_GN_MESSAGE);
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ogs_assert(e);
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e->gnode = &sgsn->gnode;
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break;
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case 2:
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sgw = mme_sgw_find_by_addr(&from);
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if (!sgw) {
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ogs_error("Unknown SGW : %s", OGS_ADDR(&from, buf));
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ogs_pkbuf_free(pkbuf);
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return;
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}
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ogs_assert(sgw);
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e = mme_event_new(MME_EVENT_S11_MESSAGE);
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ogs_assert(e);
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e->gnode = &sgw->gnode;
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break;
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default:
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ogs_warn("Rx unexpected GTP version %u", gtp_ver);
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ogs_pkbuf_free(pkbuf);
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return;
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}
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e->pkbuf = pkbuf;
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rv = ogs_queue_push(ogs_app()->queue, e);
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if (rv != OGS_OK) {
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ogs_error("ogs_queue_push() failed:%d", (int)rv);
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ogs_pkbuf_free(e->pkbuf);
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mme_event_free(e);
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}
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}
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static void timeout(ogs_gtp_xact_t *xact, void *data)
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{
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int r;
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mme_ue_t *mme_ue = NULL;
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enb_ue_t *enb_ue = NULL;
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mme_sess_t *sess = NULL;
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mme_bearer_t *bearer = NULL;
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uint8_t type = 0;
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ogs_assert(xact);
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type = xact->seq[0].type;
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switch (type) {
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case OGS_GTP2_MODIFY_BEARER_REQUEST_TYPE:
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case OGS_GTP2_RELEASE_ACCESS_BEARERS_REQUEST_TYPE:
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case OGS_GTP2_CREATE_INDIRECT_DATA_FORWARDING_TUNNEL_REQUEST_TYPE:
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case OGS_GTP2_DELETE_INDIRECT_DATA_FORWARDING_TUNNEL_REQUEST_TYPE:
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mme_ue = data;
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ogs_assert(mme_ue);
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break;
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case OGS_GTP2_CREATE_SESSION_REQUEST_TYPE:
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case OGS_GTP2_DELETE_SESSION_REQUEST_TYPE:
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sess = data;
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ogs_assert(sess);
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mme_ue = sess->mme_ue;
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ogs_assert(mme_ue);
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break;
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case OGS_GTP2_BEARER_RESOURCE_COMMAND_TYPE:
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bearer = data;
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ogs_assert(bearer);
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sess = bearer->sess;
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ogs_assert(sess);
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mme_ue = sess->mme_ue;
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ogs_assert(mme_ue);
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break;
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default:
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ogs_fatal("Invalid type [%d]", type);
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ogs_assert_if_reached();
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break;
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}
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ogs_assert(mme_ue);
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switch (type) {
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case OGS_GTP2_DELETE_SESSION_REQUEST_TYPE:
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/*
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* If SESSION_CONTEXT_WILL_DELETED(MME_UE) is not cleared,
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* The MME cannot send Delete-Session-Request to the SGW-C.
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* As such, it could be the infinite loop occurred in EMM state machine.
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*
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* To prevent this situation,
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* force clearing SESSION_CONTEXT_WILL_DELETED variable
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* when MME does not receive Delete-Session-Response message from SGW-C.
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*/
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CLEAR_SESSION_CONTEXT(mme_ue);
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enb_ue = enb_ue_cycle(mme_ue->enb_ue);
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if (enb_ue) {
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r = s1ap_send_ue_context_release_command(enb_ue,
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S1AP_Cause_PR_nas, S1AP_CauseNas_normal_release,
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S1AP_UE_CTX_REL_UE_CONTEXT_REMOVE, 0);
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ogs_expect(r == OGS_OK);
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ogs_assert(r != OGS_ERROR);
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} else {
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ogs_warn("No S1 Context");
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}
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break;
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case OGS_GTP2_BEARER_RESOURCE_COMMAND_TYPE:
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/* Nothing to do */
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break;
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default:
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mme_send_delete_session_or_mme_ue_context_release(mme_ue);
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break;
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}
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ogs_error("GTP Timeout : IMSI[%s] Message-Type[%d]",
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mme_ue->imsi_bcd, type);
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}
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int mme_gtp_open(void)
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{
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int rv;
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ogs_socknode_t *node = NULL;
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ogs_sock_t *sock = NULL;
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mme_sgw_t *sgw = NULL;
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mme_sgsn_t *sgsn = NULL;
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ogs_list_for_each(&ogs_gtp_self()->gtpc_list, node) {
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sock = ogs_gtp_server(node);
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if (!sock) return OGS_ERROR;
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node->poll = ogs_pollset_add(ogs_app()->pollset,
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OGS_POLLIN, sock->fd, _gtpv1v2_c_recv_cb, sock);
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ogs_assert(node->poll);
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}
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ogs_list_for_each(&ogs_gtp_self()->gtpc_list6, node) {
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sock = ogs_gtp_server(node);
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if (!sock) return OGS_ERROR;
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node->poll = ogs_pollset_add(ogs_app()->pollset,
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OGS_POLLIN, sock->fd, _gtpv1v2_c_recv_cb, sock);
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ogs_assert(node->poll);
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}
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OGS_SETUP_GTPC_SERVER;
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mme_self()->pgw_addr = mme_pgw_addr_find_by_apn_enb(
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&mme_self()->pgw_list, AF_INET, NULL);
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mme_self()->pgw_addr6 = mme_pgw_addr_find_by_apn_enb(
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&mme_self()->pgw_list, AF_INET6, NULL);
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ogs_assert(mme_self()->pgw_addr || mme_self()->pgw_addr6);
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ogs_list_for_each(&mme_self()->sgw_list, sgw) {
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rv = ogs_gtp_connect(
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ogs_gtp_self()->gtpc_sock, ogs_gtp_self()->gtpc_sock6,
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&sgw->gnode);
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ogs_assert(rv == OGS_OK);
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}
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ogs_list_for_each(&mme_self()->sgsn_list, sgsn) {
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rv = ogs_gtp_connect(
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ogs_gtp_self()->gtpc_sock, ogs_gtp_self()->gtpc_sock6,
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&sgsn->gnode);
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ogs_assert(rv == OGS_OK);
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}
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return OGS_OK;
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}
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void mme_gtp_close(void)
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{
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ogs_socknode_remove_all(&ogs_gtp_self()->gtpc_list);
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ogs_socknode_remove_all(&ogs_gtp_self()->gtpc_list6);
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}
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int mme_gtp_send_create_session_request(mme_sess_t *sess, int create_action)
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{
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int rv;
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ogs_gtp2_header_t h;
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ogs_pkbuf_t *pkbuf = NULL;
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ogs_gtp_xact_t *xact = NULL;
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mme_ue_t *mme_ue = NULL;
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sgw_ue_t *sgw_ue = NULL;
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mme_ue = sess->mme_ue;
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ogs_assert(mme_ue);
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sgw_ue = sgw_ue_cycle(mme_ue->sgw_ue);
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ogs_assert(sgw_ue);
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if (create_action == OGS_GTP_CREATE_IN_PATH_SWITCH_REQUEST) {
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sgw_ue = sgw_ue_cycle(sgw_ue->target_ue);
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ogs_assert(sgw_ue);
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}
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memset(&h, 0, sizeof(ogs_gtp2_header_t));
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h.type = OGS_GTP2_CREATE_SESSION_REQUEST_TYPE;
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h.teid_presence = OGS_GTP2_TEID_PRESENCE;
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h.teid = sgw_ue->sgw_s11_teid;
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pkbuf = mme_s11_build_create_session_request(h.type, sess, create_action);
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if (!pkbuf) {
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ogs_error("mme_s11_build_create_session_request() failed");
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return OGS_ERROR;
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}
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xact = ogs_gtp_xact_local_create(sgw_ue->gnode, &h, pkbuf, timeout, sess);
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if (!xact) {
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ogs_error("ogs_gtp_xact_local_create() failed");
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return OGS_ERROR;
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}
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xact->create_action = create_action;
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xact->local_teid = mme_ue->gn.mme_gn_teid;
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rv = ogs_gtp_xact_commit(xact);
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ogs_expect(rv == OGS_OK);
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return rv;
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}
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int mme_gtp_send_modify_bearer_request(
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mme_ue_t *mme_ue, int uli_presence, int modify_action)
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{
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int rv;
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ogs_gtp_xact_t *xact = NULL;
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sgw_ue_t *sgw_ue = NULL;
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ogs_gtp2_header_t h;
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ogs_pkbuf_t *pkbuf = NULL;
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ogs_assert(mme_ue);
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sgw_ue = mme_ue->sgw_ue;
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ogs_assert(sgw_ue);
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memset(&h, 0, sizeof(ogs_gtp2_header_t));
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h.type = OGS_GTP2_MODIFY_BEARER_REQUEST_TYPE;
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h.teid_presence = OGS_GTP2_TEID_PRESENCE;
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h.teid = sgw_ue->sgw_s11_teid;
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pkbuf = mme_s11_build_modify_bearer_request(h.type, mme_ue, uli_presence);
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if (!pkbuf) {
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ogs_error("mme_s11_build_modify_bearer_request() failed");
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return OGS_ERROR;
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}
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xact = ogs_gtp_xact_local_create(sgw_ue->gnode, &h, pkbuf, timeout, mme_ue);
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if (!xact) {
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ogs_error("ogs_gtp_xact_local_create() failed");
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return OGS_ERROR;
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}
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xact->modify_action = modify_action;
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xact->local_teid = mme_ue->gn.mme_gn_teid;
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rv = ogs_gtp_xact_commit(xact);
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ogs_expect(rv == OGS_OK);
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return rv;
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}
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int mme_gtp_send_delete_session_request(
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sgw_ue_t *sgw_ue, mme_sess_t *sess, int action)
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{
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int rv;
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ogs_pkbuf_t *s11buf = NULL;
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ogs_gtp2_header_t h;
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ogs_gtp_xact_t *xact = NULL;
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mme_ue_t *mme_ue = NULL;
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ogs_assert(action);
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ogs_assert(sess);
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mme_ue = sess->mme_ue;
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ogs_assert(mme_ue);
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ogs_assert(sgw_ue);
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memset(&h, 0, sizeof(ogs_gtp2_header_t));
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h.type = OGS_GTP2_DELETE_SESSION_REQUEST_TYPE;
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h.teid_presence = OGS_GTP2_TEID_PRESENCE;
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h.teid = sgw_ue->sgw_s11_teid;
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s11buf = mme_s11_build_delete_session_request(h.type, sess, action);
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if (!s11buf) {
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ogs_error("mme_s11_build_delete_session_request() failed");
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return OGS_ERROR;
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}
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xact = ogs_gtp_xact_local_create(sgw_ue->gnode, &h, s11buf, timeout, sess);
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if (!xact) {
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ogs_error("ogs_gtp_xact_local_create() failed");
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return OGS_ERROR;
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}
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xact->delete_action = action;
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xact->local_teid = mme_ue->gn.mme_gn_teid;
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ogs_debug("delete_session_request - xact:%p, sess:%p", xact, sess);
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rv = ogs_gtp_xact_commit(xact);
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ogs_expect(rv == OGS_OK);
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return rv;
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}
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void mme_gtp_send_delete_all_sessions(mme_ue_t *mme_ue, int action)
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{
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mme_sess_t *sess = NULL, *next_sess = NULL;
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sgw_ue_t *sgw_ue = NULL;
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ogs_assert(mme_ue);
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sgw_ue = mme_ue->sgw_ue;
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ogs_assert(sgw_ue);
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ogs_assert(action);
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MME_UE_CHECK(OGS_LOG_DEBUG, mme_ue);
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ogs_list_for_each_safe(&mme_ue->sess_list, next_sess, sess) {
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if (MME_HAVE_SGW_S1U_PATH(sess)) {
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mme_gtp_send_delete_session_request(sgw_ue, sess, action);
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} else {
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MME_SESS_CLEAR(sess);
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}
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}
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}
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int mme_gtp_send_create_bearer_response(
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mme_bearer_t *bearer, uint8_t cause_value)
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{
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int rv;
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ogs_gtp_xact_t *xact = NULL;
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mme_ue_t *mme_ue = NULL;
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sgw_ue_t *sgw_ue = NULL;
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ogs_gtp2_header_t h;
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ogs_pkbuf_t *pkbuf = NULL;
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ogs_assert(bearer);
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mme_ue = bearer->mme_ue;
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ogs_assert(mme_ue);
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sgw_ue = mme_ue->sgw_ue;
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ogs_assert(sgw_ue);
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xact = ogs_gtp_xact_cycle(bearer->create.xact);
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if (!xact) {
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ogs_warn("GTP transaction(CREATE) has already been removed");
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return OGS_OK;
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}
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memset(&h, 0, sizeof(ogs_gtp2_header_t));
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h.type = OGS_GTP2_CREATE_BEARER_RESPONSE_TYPE;
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h.teid_presence = OGS_GTP2_TEID_PRESENCE;
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h.teid = sgw_ue->sgw_s11_teid;
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pkbuf = mme_s11_build_create_bearer_response(h.type, bearer, cause_value);
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if (!pkbuf) {
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ogs_error("mme_s11_build_create_bearer_response() failed");
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return OGS_ERROR;
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}
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rv = ogs_gtp_xact_update_tx(xact, &h, pkbuf);
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if (rv != OGS_OK) {
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ogs_error("ogs_gtp_xact_update_tx() failed");
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return OGS_ERROR;
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}
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rv = ogs_gtp_xact_commit(xact);
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ogs_expect(rv == OGS_OK);
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return rv;
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}
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int mme_gtp_send_update_bearer_response(
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mme_bearer_t *bearer, uint8_t cause_value)
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{
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int rv;
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ogs_gtp_xact_t *xact = NULL;
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mme_ue_t *mme_ue = NULL;
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sgw_ue_t *sgw_ue = NULL;
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ogs_gtp2_header_t h;
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ogs_pkbuf_t *pkbuf = NULL;
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ogs_assert(bearer);
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mme_ue = bearer->mme_ue;
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ogs_assert(mme_ue);
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sgw_ue = mme_ue->sgw_ue;
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ogs_assert(sgw_ue);
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xact = ogs_gtp_xact_cycle(bearer->update.xact);
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if (!xact) {
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ogs_warn("GTP transaction(UPDATE) has already been removed");
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return OGS_OK;
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}
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memset(&h, 0, sizeof(ogs_gtp2_header_t));
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h.type = OGS_GTP2_UPDATE_BEARER_RESPONSE_TYPE;
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h.teid_presence = OGS_GTP2_TEID_PRESENCE;
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h.teid = sgw_ue->sgw_s11_teid;
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pkbuf = mme_s11_build_update_bearer_response(h.type, bearer, cause_value);
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if (!pkbuf) {
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ogs_error("mme_s11_build_update_bearer_response() failed");
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return OGS_ERROR;
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}
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|
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rv = ogs_gtp_xact_update_tx(xact, &h, pkbuf);
|
|
if (rv != OGS_OK) {
|
|
ogs_error("ogs_gtp_xact_update_tx() failed");
|
|
return OGS_ERROR;
|
|
}
|
|
|
|
rv = ogs_gtp_xact_commit(xact);
|
|
ogs_expect(rv == OGS_OK);
|
|
|
|
return rv;
|
|
}
|
|
|
|
int mme_gtp_send_delete_bearer_response(
|
|
mme_bearer_t *bearer, uint8_t cause_value)
|
|
{
|
|
int rv;
|
|
|
|
ogs_gtp_xact_t *xact = NULL;
|
|
mme_ue_t *mme_ue = NULL;
|
|
sgw_ue_t *sgw_ue = NULL;
|
|
|
|
ogs_gtp2_header_t h;
|
|
ogs_pkbuf_t *pkbuf = NULL;
|
|
|
|
ogs_assert(bearer);
|
|
mme_ue = bearer->mme_ue;
|
|
ogs_assert(mme_ue);
|
|
sgw_ue = mme_ue->sgw_ue;
|
|
ogs_assert(sgw_ue);
|
|
xact = ogs_gtp_xact_cycle(bearer->delete.xact);
|
|
if (!xact) {
|
|
ogs_warn("GTP transaction(DELETE) has already been removed");
|
|
return OGS_OK;
|
|
}
|
|
|
|
memset(&h, 0, sizeof(ogs_gtp2_header_t));
|
|
h.type = OGS_GTP2_DELETE_BEARER_RESPONSE_TYPE;
|
|
h.teid_presence = OGS_GTP2_TEID_PRESENCE;
|
|
h.teid = sgw_ue->sgw_s11_teid;
|
|
|
|
pkbuf = mme_s11_build_delete_bearer_response(h.type, bearer, cause_value);
|
|
if (!pkbuf) {
|
|
ogs_error("mme_s11_build_delete_bearer_response() failed");
|
|
return OGS_ERROR;
|
|
}
|
|
|
|
rv = ogs_gtp_xact_update_tx(xact, &h, pkbuf);
|
|
if (rv != OGS_OK) {
|
|
ogs_error("ogs_gtp_xact_update_tx() failed");
|
|
return OGS_ERROR;
|
|
}
|
|
|
|
rv = ogs_gtp_xact_commit(xact);
|
|
ogs_expect(rv == OGS_OK);
|
|
|
|
return rv;
|
|
}
|
|
|
|
int mme_gtp_send_release_access_bearers_request(mme_ue_t *mme_ue, int action)
|
|
{
|
|
int rv;
|
|
ogs_gtp2_header_t h;
|
|
ogs_pkbuf_t *pkbuf = NULL;
|
|
ogs_gtp_xact_t *xact = NULL;
|
|
sgw_ue_t *sgw_ue = NULL;
|
|
|
|
ogs_assert(action);
|
|
ogs_assert(mme_ue);
|
|
sgw_ue = mme_ue->sgw_ue;
|
|
ogs_assert(sgw_ue);
|
|
|
|
memset(&h, 0, sizeof(ogs_gtp2_header_t));
|
|
h.type = OGS_GTP2_RELEASE_ACCESS_BEARERS_REQUEST_TYPE;
|
|
h.teid_presence = OGS_GTP2_TEID_PRESENCE;
|
|
h.teid = sgw_ue->sgw_s11_teid;
|
|
|
|
pkbuf = mme_s11_build_release_access_bearers_request(h.type);
|
|
if (!pkbuf) {
|
|
ogs_error("mme_s11_build_release_access_bearers_request() failed");
|
|
return OGS_ERROR;
|
|
}
|
|
|
|
xact = ogs_gtp_xact_local_create(sgw_ue->gnode, &h, pkbuf, timeout, mme_ue);
|
|
if (!xact) {
|
|
ogs_error("ogs_gtp_xact_local_create() failed");
|
|
return OGS_ERROR;
|
|
}
|
|
xact->release_action = action;
|
|
xact->local_teid = mme_ue->gn.mme_gn_teid;
|
|
|
|
rv = ogs_gtp_xact_commit(xact);
|
|
ogs_expect(rv == OGS_OK);
|
|
|
|
return rv;
|
|
}
|
|
|
|
void mme_gtp_send_release_all_ue_in_enb(mme_enb_t *enb, int action)
|
|
{
|
|
mme_ue_t *mme_ue = NULL;
|
|
enb_ue_t *enb_ue = NULL, *next = NULL;
|
|
|
|
ogs_list_for_each_safe(&enb->enb_ue_list, next, enb_ue) {
|
|
mme_ue = enb_ue->mme_ue;
|
|
|
|
if (mme_ue) {
|
|
if (action == OGS_GTP_RELEASE_S1_CONTEXT_REMOVE_BY_LO_CONNREFUSED) {
|
|
/*
|
|
* https://github.com/open5gs/open5gs/pull/1497
|
|
*
|
|
* 1. eNB, SGW-U and UPF go offline at the same time.
|
|
* 2. MME sends Release Access Bearer Request to SGW-C
|
|
* 3. SGW-C/SMF sends PFCP modification,
|
|
* but SGW-U/UPF does not respond.
|
|
* 4. MME does not receive Release Access Bearer Response.
|
|
* 5. timeout()
|
|
* 6. MME sends Delete Session Request to the SGW-C/SMF
|
|
* 7. No SGW-U/UPF, so timeout()
|
|
* 8. MME sends UEContextReleaseRequest enb_ue.
|
|
* 9. But there is no enb_ue, so MME crashed.
|
|
*
|
|
* To solve this situation,
|
|
* Execute enb_ue_unlink(mme_ue) and enb_ue_remove(enb_ue)
|
|
* before mme_gtp_send_release_access_bearers_request()
|
|
*/
|
|
enb_ue_unlink(mme_ue);
|
|
enb_ue_remove(enb_ue);
|
|
}
|
|
|
|
ogs_assert(OGS_OK ==
|
|
mme_gtp_send_release_access_bearers_request(mme_ue, action));
|
|
} else {
|
|
ogs_warn("mme_gtp_send_release_all_ue_in_enb()");
|
|
ogs_warn(" ENB_UE_S1AP_ID[%d] MME_UE_S1AP_ID[%d] Action[%d]",
|
|
enb_ue->enb_ue_s1ap_id, enb_ue->mme_ue_s1ap_id, action);
|
|
|
|
if (action == OGS_GTP_RELEASE_S1_CONTEXT_REMOVE_BY_LO_CONNREFUSED ||
|
|
action == OGS_GTP_RELEASE_S1_CONTEXT_REMOVE_BY_RESET_ALL) {
|
|
enb_ue_remove(enb_ue);
|
|
} else {
|
|
/* At this point, it does not support other action */
|
|
ogs_assert_if_reached();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
int mme_gtp_send_downlink_data_notification_ack(
|
|
mme_bearer_t *bearer, uint8_t cause_value)
|
|
{
|
|
int rv;
|
|
mme_ue_t *mme_ue = NULL;
|
|
sgw_ue_t *sgw_ue = NULL;
|
|
ogs_gtp_xact_t *xact = NULL;
|
|
|
|
ogs_gtp2_header_t h;
|
|
ogs_pkbuf_t *s11buf = NULL;
|
|
|
|
ogs_assert(bearer);
|
|
xact = ogs_gtp_xact_cycle(bearer->notify.xact);
|
|
if (!xact) {
|
|
ogs_warn("GTP transaction(NOTIFY) has already been removed");
|
|
return OGS_OK;
|
|
}
|
|
mme_ue = bearer->mme_ue;
|
|
ogs_assert(mme_ue);
|
|
sgw_ue = mme_ue->sgw_ue;
|
|
ogs_assert(sgw_ue);
|
|
|
|
/* Build Downlink data notification ack */
|
|
memset(&h, 0, sizeof(ogs_gtp2_header_t));
|
|
h.type = OGS_GTP2_DOWNLINK_DATA_NOTIFICATION_ACKNOWLEDGE_TYPE;
|
|
h.teid_presence = OGS_GTP2_TEID_PRESENCE;
|
|
h.teid = sgw_ue->sgw_s11_teid;
|
|
|
|
s11buf = mme_s11_build_downlink_data_notification_ack(h.type, cause_value);
|
|
if (!s11buf) {
|
|
ogs_error("mme_s11_build_downlink_data_notification_ack() failed");
|
|
return OGS_ERROR;
|
|
}
|
|
|
|
rv = ogs_gtp_xact_update_tx(xact, &h, s11buf);
|
|
if (rv != OGS_OK) {
|
|
ogs_error("ogs_gtp_xact_update_tx() failed");
|
|
return OGS_ERROR;
|
|
}
|
|
|
|
rv = ogs_gtp_xact_commit(xact);
|
|
ogs_expect(rv == OGS_OK);
|
|
|
|
return rv;
|
|
}
|
|
|
|
int mme_gtp_send_create_indirect_data_forwarding_tunnel_request(
|
|
mme_ue_t *mme_ue)
|
|
{
|
|
int rv;
|
|
ogs_gtp2_header_t h;
|
|
ogs_pkbuf_t *pkbuf = NULL;
|
|
ogs_gtp_xact_t *xact = NULL;
|
|
sgw_ue_t *sgw_ue = NULL;
|
|
|
|
ogs_assert(mme_ue);
|
|
sgw_ue = mme_ue->sgw_ue;
|
|
ogs_assert(sgw_ue);
|
|
|
|
memset(&h, 0, sizeof(ogs_gtp2_header_t));
|
|
h.type = OGS_GTP2_CREATE_INDIRECT_DATA_FORWARDING_TUNNEL_REQUEST_TYPE;
|
|
h.teid_presence = OGS_GTP2_TEID_PRESENCE;
|
|
h.teid = sgw_ue->sgw_s11_teid;
|
|
|
|
pkbuf = mme_s11_build_create_indirect_data_forwarding_tunnel_request(
|
|
h.type, mme_ue);
|
|
if (!pkbuf) {
|
|
ogs_error("mme_s11_build_create_indirect_data_forwarding_"
|
|
"tunnel_request() failed");
|
|
return OGS_ERROR;
|
|
}
|
|
|
|
xact = ogs_gtp_xact_local_create(sgw_ue->gnode, &h, pkbuf, timeout, mme_ue);
|
|
if (!xact) {
|
|
ogs_error("ogs_gtp_xact_local_create() failed");
|
|
return OGS_ERROR;
|
|
}
|
|
xact->local_teid = mme_ue->gn.mme_gn_teid;
|
|
|
|
rv = ogs_gtp_xact_commit(xact);
|
|
ogs_expect(rv == OGS_OK);
|
|
|
|
return rv;
|
|
}
|
|
|
|
int mme_gtp_send_delete_indirect_data_forwarding_tunnel_request(
|
|
mme_ue_t *mme_ue, int action)
|
|
{
|
|
int rv;
|
|
ogs_gtp2_header_t h;
|
|
ogs_pkbuf_t *pkbuf = NULL;
|
|
ogs_gtp_xact_t *xact = NULL;
|
|
sgw_ue_t *sgw_ue = NULL;
|
|
|
|
ogs_assert(action);
|
|
ogs_assert(mme_ue);
|
|
sgw_ue = mme_ue->sgw_ue;
|
|
ogs_assert(sgw_ue);
|
|
|
|
memset(&h, 0, sizeof(ogs_gtp2_header_t));
|
|
h.type = OGS_GTP2_DELETE_INDIRECT_DATA_FORWARDING_TUNNEL_REQUEST_TYPE;
|
|
h.teid_presence = OGS_GTP2_TEID_PRESENCE;
|
|
h.teid = sgw_ue->sgw_s11_teid;
|
|
|
|
pkbuf = ogs_pkbuf_alloc(NULL, OGS_TLV_MAX_HEADROOM);
|
|
if (!pkbuf) {
|
|
ogs_error("ogs_pkbuf_alloc() failed");
|
|
return OGS_ERROR;
|
|
}
|
|
ogs_pkbuf_reserve(pkbuf, OGS_TLV_MAX_HEADROOM);
|
|
|
|
xact = ogs_gtp_xact_local_create(sgw_ue->gnode, &h, pkbuf, timeout, mme_ue);
|
|
if (!xact) {
|
|
ogs_error("ogs_gtp_xact_local_create() failed");
|
|
return OGS_ERROR;
|
|
}
|
|
xact->delete_indirect_action = action;
|
|
xact->local_teid = mme_ue->gn.mme_gn_teid;
|
|
|
|
rv = ogs_gtp_xact_commit(xact);
|
|
ogs_expect(rv == OGS_OK);
|
|
|
|
return rv;
|
|
}
|
|
|
|
int mme_gtp_send_bearer_resource_command(
|
|
mme_bearer_t *bearer, ogs_nas_eps_message_t *nas_message)
|
|
{
|
|
int rv;
|
|
ogs_gtp2_header_t h;
|
|
ogs_pkbuf_t *pkbuf = NULL;
|
|
ogs_gtp_xact_t *xact = NULL;
|
|
|
|
mme_ue_t *mme_ue = NULL;
|
|
sgw_ue_t *sgw_ue = NULL;
|
|
|
|
ogs_assert(bearer);
|
|
mme_ue = bearer->mme_ue;
|
|
ogs_assert(mme_ue);
|
|
sgw_ue = mme_ue->sgw_ue;
|
|
ogs_assert(sgw_ue);
|
|
|
|
memset(&h, 0, sizeof(ogs_gtp2_header_t));
|
|
h.type = OGS_GTP2_BEARER_RESOURCE_COMMAND_TYPE;
|
|
h.teid_presence = OGS_GTP2_TEID_PRESENCE;
|
|
h.teid = sgw_ue->sgw_s11_teid;
|
|
|
|
pkbuf = mme_s11_build_bearer_resource_command(h.type, bearer, nas_message);
|
|
if (!pkbuf) {
|
|
ogs_error("mme_s11_build_bearer_resource_command() failed");
|
|
return OGS_ERROR;
|
|
}
|
|
|
|
xact = ogs_gtp_xact_local_create(sgw_ue->gnode, &h, pkbuf, timeout, bearer);
|
|
if (!xact) {
|
|
ogs_error("ogs_gtp_xact_local_create() failed");
|
|
return OGS_ERROR;
|
|
}
|
|
xact->xid |= OGS_GTP_CMD_XACT_ID;
|
|
xact->local_teid = mme_ue->gn.mme_gn_teid;
|
|
|
|
rv = ogs_gtp_xact_commit(xact);
|
|
ogs_expect(rv == OGS_OK);
|
|
|
|
return rv;
|
|
}
|
|
|
|
/*************************
|
|
* GTPv1C (Gn interface):
|
|
*************************/
|
|
|
|
int mme_gtp1_send_sgsn_context_request(
|
|
mme_sgsn_t *sgsn, mme_ue_t *mme_ue)
|
|
{
|
|
int rv;
|
|
ogs_gtp1_header_t h;
|
|
ogs_pkbuf_t *pkbuf = NULL;
|
|
ogs_gtp_xact_t *xact = NULL;
|
|
|
|
ogs_assert(sgsn);
|
|
|
|
memset(&h, 0, sizeof(ogs_gtp1_header_t));
|
|
h.type = OGS_GTP1_SGSN_CONTEXT_REQUEST_TYPE;
|
|
h.teid = 0;
|
|
|
|
pkbuf = mme_gn_build_sgsn_context_request(mme_ue);
|
|
if (!pkbuf) {
|
|
ogs_error("mme_gn_build_ran_information_relay() failed");
|
|
return OGS_ERROR;
|
|
}
|
|
|
|
xact = ogs_gtp1_xact_local_create(&sgsn->gnode, &h, pkbuf, NULL, NULL);
|
|
if (!xact) {
|
|
ogs_error("ogs_gtp1_xact_local_create() failed");
|
|
return OGS_ERROR;
|
|
}
|
|
/* TS 29.060 8.2: "The SGSN Context Request message, where the Tunnel
|
|
* Endpoint Identifier shall be set to all zeroes." */
|
|
xact->local_teid = 0;
|
|
|
|
rv = ogs_gtp_xact_commit(xact);
|
|
ogs_expect(rv == OGS_OK);
|
|
|
|
return rv;
|
|
}
|
|
|
|
int mme_gtp1_send_sgsn_context_response(
|
|
mme_ue_t *mme_ue, uint8_t cause, ogs_gtp_xact_t *xact)
|
|
{
|
|
int rv;
|
|
ogs_gtp1_header_t h;
|
|
ogs_pkbuf_t *pkbuf = NULL;
|
|
|
|
memset(&h, 0, sizeof(ogs_gtp1_header_t));
|
|
h.type = OGS_GTP1_SGSN_CONTEXT_RESPONSE_TYPE;
|
|
h.teid = mme_ue ? mme_ue->gn.sgsn_gn_teid : 0;
|
|
|
|
pkbuf = mme_gn_build_sgsn_context_response(mme_ue, cause);
|
|
if (!pkbuf) {
|
|
ogs_error("mme_gn_build_sgsn_context_response() failed");
|
|
return OGS_ERROR;
|
|
}
|
|
xact->local_teid = mme_ue ? mme_ue->gn.mme_gn_teid : 0;
|
|
|
|
rv = ogs_gtp1_xact_update_tx(xact, &h, pkbuf);
|
|
if (rv != OGS_OK) {
|
|
ogs_error("ogs_gtp1_xact_update_tx() failed");
|
|
return OGS_ERROR;
|
|
}
|
|
|
|
rv = ogs_gtp_xact_commit(xact);
|
|
ogs_expect(rv == OGS_OK);
|
|
|
|
return rv;
|
|
}
|
|
|
|
int mme_gtp1_send_sgsn_context_ack(
|
|
mme_ue_t *mme_ue, uint8_t cause, ogs_gtp_xact_t *xact)
|
|
{
|
|
int rv;
|
|
ogs_gtp1_header_t h;
|
|
ogs_pkbuf_t *pkbuf = NULL;
|
|
|
|
ogs_assert(mme_ue);
|
|
|
|
memset(&h, 0, sizeof(ogs_gtp1_header_t));
|
|
h.type = OGS_GTP1_SGSN_CONTEXT_ACKNOWLEDGE_TYPE;
|
|
h.teid = mme_ue->gn.sgsn_gn_teid;
|
|
|
|
pkbuf = mme_gn_build_sgsn_context_ack(mme_ue, cause);
|
|
if (!pkbuf) {
|
|
ogs_error("mme_gn_build_sgsn_context_response() failed");
|
|
return OGS_ERROR;
|
|
}
|
|
xact->local_teid = mme_ue->gn.mme_gn_teid;
|
|
|
|
rv = ogs_gtp1_xact_update_tx(xact, &h, pkbuf);
|
|
if (rv != OGS_OK) {
|
|
ogs_error("ogs_gtp1_xact_update_tx() failed");
|
|
return OGS_ERROR;
|
|
}
|
|
|
|
rv = ogs_gtp_xact_commit(xact);
|
|
ogs_expect(rv == OGS_OK);
|
|
|
|
return rv;
|
|
}
|
|
|
|
int mme_gtp1_send_ran_information_relay(
|
|
mme_sgsn_t *sgsn, const uint8_t *buf, size_t len,
|
|
const ogs_nas_rai_t *rai, uint16_t cell_id)
|
|
{
|
|
int rv;
|
|
ogs_gtp1_header_t h;
|
|
ogs_pkbuf_t *pkbuf = NULL;
|
|
ogs_gtp_xact_t *xact = NULL;
|
|
|
|
ogs_assert(sgsn);
|
|
ogs_assert(buf);
|
|
|
|
memset(&h, 0, sizeof(ogs_gtp1_header_t));
|
|
h.type = OGS_GTP1_RAN_INFORMATION_RELAY_TYPE;
|
|
h.teid = 0;
|
|
|
|
pkbuf = mme_gn_build_ran_information_relay(h.type, buf, len, rai, cell_id);
|
|
if (!pkbuf) {
|
|
ogs_error("mme_gn_build_ran_information_relay() failed");
|
|
return OGS_ERROR;
|
|
}
|
|
|
|
xact = ogs_gtp1_xact_local_create(&sgsn->gnode, &h, pkbuf, NULL, NULL);
|
|
if (!xact) {
|
|
ogs_error("ogs_gtp1_xact_local_create() failed");
|
|
return OGS_ERROR;
|
|
}
|
|
/* TS 29.060 8.2: "The RAN Information Relay message, where the Tunnel
|
|
* Endpoint Identifier shall be set to all zeroes." */
|
|
xact->local_teid = 0;
|
|
|
|
rv = ogs_gtp_xact_commit(xact);
|
|
ogs_expect(rv == OGS_OK);
|
|
|
|
return rv;
|
|
}
|